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Die-cut tab cylindrical battery and manufacturing process thereof

A cylindrical battery and manufacturing process technology, which is applied in the direction of sustainable manufacturing/processing, hybrid/electric double layer capacitor manufacturing, secondary batteries, etc., can solve problems affecting battery power performance, and avoid welding slag and burrs, Effects of improving reliability and increasing quantity

Pending Publication Date: 2021-03-16
TIANJIN SPACE POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional lithium-ion batteries usually consist of positive and negative pole pieces, separators, and current collector tabs. The tabs are usually welded to the pole pieces by ultrasonic welding, so the current collector tabs often become the limit of the battery’s current collection capacity. In the process of high current discharge, a large amount of heat will be generated, which will affect the power performance of the battery

Method used

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  • Die-cut tab cylindrical battery and manufacturing process thereof
  • Die-cut tab cylindrical battery and manufacturing process thereof
  • Die-cut tab cylindrical battery and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Firstly, the slurry containing the positive active material and the negative active material is respectively coated on the aluminum foil and the copper foil current collector, and an uncoated area with a width of 20mm is reserved on both sides of the aluminum foil and the copper foil current collector.

[0036] (2) Use a cutting machine to cut the aluminum foil and copper foil current collector coated with the active material into a suitable width.

[0037] (3) Use a laser die-cutting machine to cut the uncoated area reserved for the aluminum foil and copper foil collector according to the predetermined procedure and at a certain interval into the following figure 1 structure shown.

[0038] (4) A winding machine is used to wind the positive and negative pole pieces and the diaphragm after die-cutting the tab 1 to form a battery cell, and the wound tabs of the battery core present a circular distribution.

[0039] (5) Use special plastic tooling to shape the tab 2 ...

Embodiment 2

[0043] (1) Firstly, the slurry containing the positive active material and the negative active material is respectively coated on the aluminum foil and the copper foil current collector, and an uncoated area with a width of 30mm is reserved on both sides of the aluminum foil and the copper foil current collector.

[0044] (2) Use a cutting machine to cut the aluminum foil and copper foil current collector coated with the active material into a suitable width.

[0045] (3) Use a laser die-cutting machine to cut the uncoated area reserved for the aluminum foil and copper foil current collector into the following according to the predetermined program and a certain interval width. figure 1 structure shown.

[0046] (4) Use a winding machine to wind the positive and negative pole pieces and diaphragm after die-cutting the tabs into a battery cell, and the tabs of the battery core should be distributed in a straight line.

[0047] (5) Use special plastic tooling to shape the tabs ...

Embodiment 3

[0051] (1) Firstly, the slurry containing the positive active material and the negative active material is respectively coated on the aluminum foil and the copper foil current collector, and an uncoated area with a width of 30mm is reserved on both sides of the aluminum foil and the copper foil current collector.

[0052] (2) Use a slitter to cut the aluminum foil coated with the active material and the aluminum foil current collector into appropriate widths.

[0053] (3) Use a laser die-cutting machine to cut the uncoated area reserved for the aluminum foil and copper foil current collector into the following according to the predetermined program and a certain interval width. figure 1 structure shown.

[0054] (4) Use a winding machine to wind the positive and negative pole pieces and diaphragm after die-cutting the tabs into a battery cell, and the tabs of the battery core should be distributed in a straight line.

[0055] (5) Use special plastic tooling to shape the tabs ...

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Abstract

The invention discloses a die-cut tab cylindrical battery and a manufacturing process thereof, and belong to the technical field of chemical power supplies. The process is characterized by comprisingthe following steps: S1, respectively coating slurry containing a positive electrode active substance and a negative electrode active substance on an aluminum foil current collector and a copper foilcurrent collector, and reserving uncoated areas with certain widths on the edges of the two sides of the aluminum foil and copper foil current collectors; S2, slitting the aluminum foil and copper foil current collectors coated with the active substances into required widths; S3, cutting the reserved uncoated areas of the aluminum foil current collector and the copper foil current collector to obtain tabs, wherein the tabs are of an integrally-formed structure; S4, winding the positive and negative pole pieces after die cutting of the tabs and the diaphragm to form a battery core; S5, shapingthe tabs; S6, welding the tabs; and S7, assembling the welded battery core and parts together, and then performing liquid injection and formation to obtain a finished product battery.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a die-cut tab cylindrical battery and a manufacturing process thereof. Background technique [0002] As we all know, lithium-ion batteries have the advantages of long cycle life, no memory effect and good rate performance, so they have been widely used in the fields of consumer electronics and power batteries. Traditional lithium-ion batteries usually consist of positive and negative pole pieces, separators, and current collector tabs. The tabs are usually welded to the pole pieces by ultrasonic welding, so the current collector tabs often become the limit of the battery’s current collection capacity. In this link, large heat will be generated during high current discharge, which will affect the power performance of the battery. Contents of the invention [0003] In order to solve the technical problems in the known technology, the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/533H01M50/528H01M4/139H01M10/0525H01M10/054H01M10/0587H01G11/86H01G11/28
CPCH01M4/139H01M10/0587H01M10/0525H01M10/054H01G11/28H01G11/86Y02E60/10Y02P70/50
Inventor 郑见杰王炜娜杜园杨彩玲张志伟
Owner TIANJIN SPACE POWER TECH CO LTD
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